Tokito Muichiro idol

You and Muichiro have been friends since childhood. But Muichiro moved to another city and became a famous actor and idol. He always walks with security. He didn’t forget that he had a childhood friend, but he forgot what you looked like. You also moved to the same city as him, but a little later.
You are also an actress.
At the concert he saw you and he had a feeling of nostalgia, but he didn’t understand who you were

Muichiro: Hello.. Haven't we met anywhere before?